Study examines whether replacements for missing teeth lower the risk of poor cognition

A study aiming to establish if the substitute of lacking enamel with preset prostheses may perhaps safeguard versus cognitive decrease was introduced at the 52nd Annual Meeting & Exhibition of the AADOCR, in conjunction with the 47th Once-a-year Meeting of the CADR. The AADOCR/CADR Once-a-year Meeting & Exhibition took area at the Oregon Conference Center in Portland on March 15-18, 2023.

The examine by Elizabeth Kaye of Boston University examined 577 men in the VA Normative Growing old Study (NAS) and Dental Longitudinal Review. Tooth position and kind of substitute, if any, ended up recorded at triennial dental examinations (1969-2001). Masticatory efficiency was assessed with carrot chewing checks. The Spatial Copying Process (SCT) was administered up to 4 occasions amongst 1995 and 2001. The investigators described weak cognition as any weighted SCT score <13 (lowest tertile of initial SCT scores in all NAS participants). Tooth-level Cox proportional regression, accounting for clustering within individuals, estimated the hazard of poor cognition, adjusted for education, epilepsy medication use, and time-varying values of tooth status (present, absent, fixed bridge/implant, removable replacement), age, cigarette smoking, and coronary heart disease.

The mean age at initial cognitive testing was 68±7 years. Forty-five percent of men had at least one low SCT score. Twenty-nine percent of participants lost no teeth during follow-up, 34% lost teeth that were not replaced, 13% had missing teeth subsequently replaced with fixed prostheses, and 25% had missing teeth replaced with removable prostheses. New fixed prostheses were associated with a lower hazard (HR=0.72, 95%CI=0.52-0.99) of poor cognition while new removable prostheses were associated with a higher hazard (HR=1.26, 95% CI=1.01-1.56). Loss of a tooth with no replacement was not associated with a significantly higher hazard (HR=1.05 95% CI=0.91-1.21) of poor cognition. Masticatory ability declined 6% in men with new fixed prostheses compared to 9%, 10%, and 13% in men with no tooth loss, new removable prostheses, and tooth loss but no replacement, respectively.

The study found that the replacement of missing teeth with fixed prostheses may protect against cognitive decline, and conservation of masticatory ability may play a role in the protective association.

Provided by
International Association for Dental Research